Viscosity of polymer-bitumen binders

Polymer-bitumen binders for the highway engineering were obtained by the ad dition of a ternary ethylene-propylene rubber to a bitumen. The addition of a vulcanizing agent to a polymer-bitumen composition caused the structurin g of the system through cross-linking of rubber molecules in the bitumen ma trix that was confirmed by the study of structural viscosity of the polymer -bitumen compositions, as well as molecular mobility by the methods of NMR- relaxation and pulsed field gradient NMR-relaxation (self-diffusion).